85185631 has 8 divisors (see below), whose sum is σ = 86073344. Its totient is φ = 84301560.

The previous prime is 85185601. The next prime is 85185643. The reversal of 85185631 is 13658158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 85185631 - 2⁵ = 85185599 is a prime.

It is a super-2 number, since 2×85185631² = 14513183457736322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85185601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79606 + ... + 80668.

It is an arithmetic number, because the mean of its divisors is an integer number (10759168).

Almost surely, 2^85185631 is an apocalyptic number.

85185631 is a deficient number, since it is larger than the sum of its proper divisors (887713).

85185631 is a wasteful number, since it uses less digits than its factorization.

85185631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1821.

The product of its digits is 28800, while the sum is 37.

The square root of 85185631 is about 9229.6062212859. The cubic root of 85185631 is about 440.0028081777.

The spelling of 85185631 in words is "eighty-five million, one hundred eighty-five thousand, six hundred thirty-one".